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31012201 = 116014691
BaseRepresentation
bin111011001001…
…1010101101001
32011100120202001
41312103111221
530414342301
63024411001
7524412403
oct166232551
964316661
1031012201
1116561a20
12a476a61
13656a91c
144193b73
152ac8c01
hex1d93569

31012201 has 8 divisors (see below), whose sum is σ = 33895008. Its totient is φ = 28140000.

The previous prime is 31012193. The next prime is 31012213. The reversal of 31012201 is 10221013.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31012201 - 23 = 31012193 is a prime.

It is a super-2 number, since 2×310122012 = 1923513221728802, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31012231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4266 + ... + 8956.

It is an arithmetic number, because the mean of its divisors is an integer number (4236876).

Almost surely, 231012201 is an apocalyptic number.

It is an amenable number.

31012201 is a deficient number, since it is larger than the sum of its proper divisors (2882807).

31012201 is a wasteful number, since it uses less digits than its factorization.

31012201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5303.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 31012201 is about 5568.8599371864. The cubic root of 31012201 is about 314.1792727209.

Adding to 31012201 its reverse (10221013), we get a palindrome (41233214).

It can be divided in two parts, 31012 and 201, that added together give a palindrome (31213).

The spelling of 31012201 in words is "thirty-one million, twelve thousand, two hundred one".

Divisors: 1 11 601 4691 6611 51601 2819291 31012201